diff --git a/CMakeLists.txt b/CMakeLists.txt
index f904b49..40017c5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -118,12 +118,13 @@
 include(CheckFunctionExists)
 include(CheckTypeSize)
 if(WIN32)
-  set(CMAKE_EXTRA_INCLUDE_FILES winsock2.h)
+  set(CMAKE_EXTRA_INCLUDE_FILES winsock2.h ws2tcpip.h)
   set(CMAKE_REQUIRED_LIBRARIES ws2_32)
+else()
+  set(CMAKE_EXTRA_INCLUDE_FILES sys/socket.h)
 endif()
 check_function_exists(inet_aton HAVE_INET_ATON)
 check_function_exists(inet_ntop HAVE_INET_NTOP)
-set(CMAKE_EXTRA_INCLUDE_FILES sys/socket.h)
 check_type_size(socklen_t SOCKLEN_T)
 
 set(CMAKE_EXTRA_INCLUDE_FILES)